CR-Camera 4-pin Remote Port Cable for Panasonic GH4 (2.5″ plug, length 25cm/9.8″ – 5g). Controls Focus and Shutter release, Movie recording and Zoom with variable speed. Zoom option is available if lens have motorized zoom control (lens models: 45-175X, 14-42X). Be sure your camera have 2.5″ Remote Port jack! Connect it to LANC/RP port of the CAMremote.